Nuvoton Technology has introduced the upgraded NuMicro® MG51 series, an enhanced 1T-8051 microcontroller designed for use in home appliances, LED dimming, motor control, and industrial automation applications.
Key Features of the NuMicro® MG51 Series:
- High-Speed Core: 1T-8051 core running up to 24 MHz.
- Rich Memory: Up to 64 KB of Flash memory, 4 KB of SRAM, and 4 KB of LDROM.
- Robust Operation: Wide voltage (2.4V-5.5V) and industrial temperature (-40°C to +105°C) support.
- High Noise Immunity: 7 kV ESD (HBM) and 4.4 kV EFT protection.
- Advanced Control: Up to 12-channel PWM for precise motor control.
- Flexible Communication: Up to 5 UARTs, SPI, and I²C interfaces.
- High-Precision Sensing: 15-channel, 12-bit ADC with 500 kSPS sampling rate.
- Ample I/O: Up to 46 GPIOs with flexible interrupt configuration.
The MG51 series, operating at speeds up to 24 MHz, offers up to 64 KB of Flash memory, 4 KB of SRAM, and 4 KB of LDROM. Designed for 5V operation with industrial-grade temperature tolerance and strong noise immunity, it integrates a comprehensive set of communication and control peripherals. With multiple package options—including a 48-pin variant supporting up to 46 external interrupt-capable I/Os—the MG51 provides developers with high design flexibility and scalability.
Key features include four 16-bit timers and up to five independent UARTs. Among these, two UARTs support built-in error detection and automatic address recognition, while three offer ISO 7816-3 compliance with automatic parity check functionality. The MG51 also includes one SPI and one I²C interface, enabling versatile communication and data transfer capabilities.
The MG51 series supports up to 12-channel PWM outputs, making it well-suited for small motor control applications like fans and pumps. It also features up to 15-channel 12-bit ADCs with a 500 kSPS continuous conversion rate, enabling real-time sensing of parameters such as temperature, current, and light—ideal for smart appliances, energy management systems, and industrial automation.
With 24 interrupt sources and four levels of interrupt priority, the MG51 enables responsive multi-point input control and event-driven operation. Its flexible I/O configuration makes it a strong fit for applications such as LED dimming, keypad control, audio systems, and alarm modules. The series delivers robust performance across a wide industrial temperature range of -40°C to +105°C and features strong noise immunity, with ESD protection up to 7 kV and EFT protection up to 4.4 kV. It operates over a wide voltage range of 2.4V to 5.5V, ensuring reliable functionality in varied power conditions.
In terms of chip security, this series offers three protection mechanisms.
- Prevents program readout via ICP pins through Flash lock bits.
- Built-in 128-byte Security Protection ROM (SPROM). In security mode, the SPROM region is executable-only and inaccessible for code or data read. In non-security mode, it can also be used as Data Flash.
- Provides a 96-bit Unique Identification (UID) and a customizable 128-bit Unique Customer Identification (UCID).
Package options include TSSOP20/28, QFN20/33, and LQFP32/48—six types in total—addressing the needs of space-constrained applications. The entire MG51 series is now in mass production and fully available.
Comprehensive development resources are also offered, including the NuMaker development boards and Nu-Link debuggers. MG51 is compatible with Keil C51, IAR EW8051, and NuEclipse SDCC development toolchains. Notably, NuEclipse is Nuvoton’s in-house cross-platform embedded development suite for 8051 and Arm cores, designed specifically for the NuMicro® MCU series. It integrates multiple Eclipse plug-ins and tools, enabling developers to efficiently build, compile, and debug projects within the familiar Eclipse framework across both Linux and Windows platforms, thereby accelerating development and reducing time-to-market.
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